International Journal of Renewable Energy Resourceshttps://mjes.um.edu.my/index.php/IJRER
<p>IJRER (<strong>ISSN 2289-1846</strong>) accepts original research papers or any other original contribution in the form of reviews and report on new concepts. It promotes innovation, papers of a tutorial nature and a general exchange of news, views and new books on the above subjects.&nbsp;The scope of the journal encompasses the following: Photovoltaic Technology Conversion, Solar Thermal Application, Biomass Conversion, Wind Energy Technology, Materials Science Technology, Solar and Low Energy Architecture, Energy Conservation in Buildings, Climatology , Socio-economic, Energy Management, Solar Cells, Bio and hydrogen energy.&nbsp;</p>UMPEDAC, University of Malayaen-USInternational Journal of Renewable Energy Resources2289-1846

ELECTROSPUN METAL OXIDES NANOSTRUCTURES FOR ENERGY RELATED DEVICEShttps://mjes.um.edu.my/index.php/IJRER/article/view/8010
<p><span class="fontstyle0">Metal oxide nanostructures of wide bandgap<br>semiconductors with various morphologies, high degree<br>of crystallinity and surface properties were fabricated by<br>electrospinning a polymeric solution containing<br>respective metal ions and their controlled heat treatment.<br>The metal oxide nanostructures thus developed were<br>tested for their application as charge separation and<br>transport medium in solar cells, cathodes for low<br>voltage (2 V) lithium ion batteries, and super capacitors.<br>The solar cells thus fabricated features enhanced<br>electron diffusion coefficient and energy storage devices<br>featured stable electrochemical cycling thereby making<br>electrospun metal oxide nanostructures a viable product<br>for next generation energy industry.</span></p>R. JoseI.I. MisnonP.S. ArchanaA.L. VietM.V. ReddyM.M. YusofS. Ramakrishna
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2012-12-152012-12-15224045 INDUSTRIAL AND ADAPTABLE COMPONENTS FOR BUILDING WASTE REDUCTIONhttps://mjes.um.edu.my/index.php/IJRER/article/view/8012
<p><span class="fontstyle0">One of the main concerns of environmental sustainability is<br>to reduce the depletion of valuable materials and natural<br>resources. To do so, construction waste management needs<br>to be considered in the early stages of building components<br>design and preparation. Industrial, Flexible and Demountable<br>building system (IFD) is attempting to create more adaptable<br>buildings while managing its end-of-life more efficiently and<br>focusing on the long-term performance of the structure and<br>materials. This research focuses on the development of an<br>IFD system for a two-story residential layout. In this regard,<br>proposing a procedure to evaluate the conceptual prototype<br>was the key concern. The procedure contains assessments<br>according to IFD criteria and structural characteristics.<br>ETABS software was applied for analyzing the stability and<br>load bearing capacity of the structure. The assessments have<br>testified to the flexibility and strength of the designed layout.<br>Findings from this study have implications for future<br>investigations on detail design and experimental analysis of<br>the components.</span> </p>N. SadafM.F.M ZainM. Jamil
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2012-12-152012-12-15224651 INVESTIGATION OF BUFFER LAYERS, FRONT AND BACK CONTACTS FOR ZnxCd1- xS/CdTe PHOTOVOLTAIChttps://mjes.um.edu.my/index.php/IJRER/article/view/8013
<p><span class="fontstyle0">A numerical analysis was executed utilizing Analysis of<br>Microelectronic and Photonic Structures (AMPS 1D)<br>simulator to explore the possibility of higher efficiency<br>and stable Zn</span><span class="fontstyle0">x</span><span class="fontstyle0">Cd</span><span class="fontstyle0">1-x</span><span class="fontstyle0">S/CdTe cells among several cell<br>structures with indium tin oxide (ITO) and cadmium<br>stannate (Cd</span><span class="fontstyle0">2</span><span class="fontstyle0">SnO</span><span class="fontstyle0">4</span><span class="fontstyle0">) as front contact, zinc stannate<br>(Zn</span><span class="fontstyle0">2</span><span class="fontstyle0">SnO</span><span class="fontstyle0">4</span><span class="fontstyle0">) and zinc oxide (ZnO) insertion as buffer<br>layer and antimony telluride (Sb</span><span class="fontstyle0">2</span><span class="fontstyle0">Te</span><span class="fontstyle0">3</span><span class="fontstyle0">) insertion with<br>Nickle (Ni) as back contact was conducted in the<br>conventional (SnO</span><span class="fontstyle0">2</span><span class="fontstyle0">/CdS/CdTe/Ag) CdTe cell structures<br>in which CdS is replaced by zinc cadmium sulphide<br>(Zn</span><span class="fontstyle0">x</span><span class="fontstyle0">Cd</span><span class="fontstyle0">1-x</span><span class="fontstyle0">S) as window layer. Efficiency as high as<br>18.0% has been found with 80 nm of Zn</span><span class="fontstyle0">x</span><span class="fontstyle0">Cd</span><span class="fontstyle0">1-x</span><span class="fontstyle0">S window<br>layer for x=0.05, 1 µm of CdTe layer and 100 nm<br>Zn</span><span class="fontstyle0">2</span><span class="fontstyle0">SnO</span><span class="fontstyle0">4 </span><span class="fontstyle0">buffer layer without Sb</span><span class="fontstyle0">2</span><span class="fontstyle0">Te</span><span class="fontstyle0">3 </span><span class="fontstyle0">back contact.<br>However, ZnO insertion shows low conversion<br>efficiency of 7.84% and 12.26%, respectively with and<br>without Sb</span><span class="fontstyle0">2</span><span class="fontstyle0">Te</span><span class="fontstyle0">3 </span><span class="fontstyle0">back contact. Moreover, it was found<br>that the cell normalized efficiency linearly decreases<br>with the increasing operating temperature at the<br>temperature gradient of -0.25%/°C.</span> </p>M.S. HossainN. AminM.M. AliyuM.A. MatinT. RazykovM.R. KarimK. Sopian
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2012-12-152012-12-15225257 EXERGY ANALYSIS OF A STEAM POWER SYSTEM FOR POWER PRODUCTIONhttps://mjes.um.edu.my/index.php/IJRER/article/view/8014
<p><span class="fontstyle0">The present study deals with an Analysis of power<br>generation systems are of scientific interest and also<br>essential for the efficient utilization of energy resources.<br>The most commonly-used method for analysis of an energyconversion process is the first law of thermodynamics.<br>Therefore, the effect of key parameters on the output power<br>and efficiency are so important. In this paper, the effects of<br>key parameters in both firs law and second law of<br>thermodynamics point of view have performed. It was<br>intended to determine unfavorable points from exergy<br>destruction concept using exergy analysis for steam power<br>plants cycle. Also, variation in efficiency and exergy<br>destruction is evaluated using variations of temperature of<br>high pressure steam, temperature of reheat, and condenser<br>pressure. The study of the effect of feed-water heaters<br>shows that increase in number of heaters up to 3 causes<br>increase in both first and second low efficiency, but further<br>increase has the reverse effect. The results show that boiler<br>has the greatest exergy destruction among the power plant<br>components.</span></p>A.G. KaviriM.N.M. JaafarM.L. TholudinH.B. Avval
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2012-12-152012-12-15225862 SYNTHESES, CHARACTERIZATIONS AND TESTINGS OF CARBON NANOFIBRE FOR HYDROGEN ADSORPTION STUDIEShttps://mjes.um.edu.my/index.php/IJRER/article/view/8015
<p><span class="fontstyle0">Renewable energy (RE) has been declared as the fifth fuel<br>of Malaysia in addition to oil, gas, coal and hydropower.<br>One of REs which is hydrogen has become an alternative<br>fuel for transportation to replace petroleum. For sufficient<br>hydrogen storage, the system requires an inexpensive, safe,<br>low weight tank, comparable in to a gasoline tank with<br>capability of quick loading and unloading hydrogen fuel.<br>Carbon nanomaterials have been nominated as one of the<br>best medium to store hydrogen due to its light weight, low<br>cost production depending upon types of synthesis methods,<br>non-toxic and can be generated with improvement in its<br>storage capacity. The research work focuses on the<br>development of carbon nanofibers by using chemical vapor<br>deposition method. The development of catalysts such as<br>iron (III) oxide and nickel (II) oxide for the synthesis of<br>carbon nanofibers (CNFs) has also been investigated. The<br>capacity of the developed materials in hydrogen adsorption<br>is tested at 298K and the pressure is up to 100 bar using<br>gravimetric measurement technique. Sample imaging<br>observations using field emission electron microscopy<br>(FESEM) and transmission electron microscopy (TEM)<br>indicate that the synthesized CNFs have both platelet and<br>herringbone structure with little carbon nanotubes (CNTs).<br>Iron-based catalyst CNF (Fe-C) samples have diameter size<br>of 170 nm while nickel-based catalyst CNF (Ni-C) has<br>diameter size of 200 nm. Specific BET surface area of Fe-C<br>and Ni-C are 92.34 m²/g and 45.96 m²/g, respectively. Both<br>analysis which are energy-dispersive X-ray (EDX) and<br>thermogravimetric proved that purity of Fe-C is between<br>88% to 95% while purity of Ni-C is ranges from 95% to<br>97%. For iron-based catalyst CNF, the highest uptake is<br>0.46 wt % at 70 bar and for nickel-based catalyst CNF, the<br>highest uptake is 1.76 wt % at 70 bar.</span> </p>N.S.M. ShahS. SufianS. Yusup
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2012-12-152012-12-15226368 THE USE OF ULTRASONIC TO INCREASE THE EFFICIENCY OF OIL EXTRACTION FOR MICROALGAE INDIGENOUS ISOLATES FROM POND GRESIK, EAST JAVAhttps://mjes.um.edu.my/index.php/IJRER/article/view/8016
<p><span class="fontstyle0">The prospect of microalgae biomass as a biodiesel is as a<br>renewable energy. The microalgae biomass is aimed to<br>substitute the petroleum. The identification of<br>microalgae was conducted on twice which was derived<br>from Gresik ponds consist of 29 species. On the other<br>hand, there were 10 species which were resulted from<br>laboratory test of Biology, Science Faculty, UM. Among<br>the isolated, there are 2 species that faster growth<br>rate, Chlorella vulgaris and Spirogyra sp. Generally,<br>extraction of oil from microalgae biomass requires a<br>long time. The aims from the research are to examine<br>three methods of oil extraction from the two species of<br>microalgae, the experimental laboratory techniques.<br>Biomass of microalgae dry powder was extracted using<br>the solvent n- hexane by three methods, Soxhlet,<br>maceration and ultrasonic waves. On the acquisition of<br>microalgae oil the yield equivalent, compared with<br>extraction time from the three methods. The smaller time<br>of microalgae oil extraction is the more efficient<br>extraction. The results showed: (1) the use of ultrasonic<br>waves can improve the efficiency of microalgae oil<br>extraction. (2) The yield of algae oil which is extracted<br>using the method Soxhlet, maceration, and extraction<br>with the aid of ultrasonic waves in a row is 1.58%,<br>1.03%, and 1.77% by the time it takes for 18 hours, 8<br>hours, and 2.33 hours.</span> </p>E. SuarsiniS. Subandi
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2012-12-152012-12-15226973